Finally got the new Calfee Tandem. Technically, its a custom modified Tetra. The goal was a dual use bike that 1) would ride on the road as close as possible to our Dragonfly, and 2) be capable for gravel and bikepacking.
Calfee's Adventure tandem has a bit different geometry than their road tandems, with a bit different angles and a higher bottom bracket. So instead we started with a Tetra frame, to have the same road geometry and modified it to be off road capable.
The modifications are 1) rear stay clearance to allow 650b wheels with 45-50mm tires, 2) rack mounts front and back, 3) Colabs TA15 fork to allow wide tire clearance, 4) extra water bottle mount, 5) reinforcement from rock strikes to captains bottom bracket, 6) longer captain top tube to reduce toe overlap with bigger tires.
The groupset is Ultegra Di2, hope brakes, FSA seatposts stems and bars. FSA crankset, veer carbon fiber belt.
We spec'd two sets of wheels. Road wheels are 55 mm Calfee private branded with White Industries hubs, and 25 mm tires. The Gravvel wheels are also Calfee private label, but 650b with 45 mm tires.
Have just ridden a couple of miles to bed the brakes in. But so far it rides very comparable to the Dragonfly.
